Electric pull switch and socket



0a. 1, 1929. F, RQSNER 1,730,043

ELECTRIC PULL SWITCH AND SOCKET I Filed May 23, 1927 2 Sheets-Sheet 1 W Kg! INVENTOR I. R as): er,

I Oct. 1, 1929. F. RosNER 9 I ELECTRIC PULL SWITCH AND SOCKET filed May 25, 1927 2 Sheets-Sheet 2 Patented Get. 1, 1929 s'rs FREDRICK ROSNER, F BROOKLYN, NEW YORK ELECTRIC PULL SWITCH AND SOCKET,

Application filed May 23, 1927. Serial No. 193,638.

The main object of my invention is to provide a simple and reliable construction which can be made very cheaply.

Another object is to provide an eflicient construction which consists of a minimum number of parts and which may be readily assembled.

In carrying out the invention I preferably form the insulating support of two parts, namely, a body and a covered disc. The body has a recess in one face in which is mounted the switch mechanism. This mechanism including the rotating switch member, the oscillater and the chain guide are all mounted on a shaft which is readily insertable and removable into the recess and held in place by the disc. The shaft 'is of hook-like form so as to prevent its rotation and provide self contained stop mechanism for the oscillator.

The conducting member secured to the disc serves at one end as a center lamp contact and at the other end as a pawl member for the contact ratchet of the switch. One of the circuit terminals is connected to the screw shell and the other circuit terminal has an extension brush coacting with the contact member of the switch. I

The details of construction and the method of operation will be understood from the following specification:

Fig. 1 is a side view of one form of a pull socketembodying my invention and showing in dot and dash outline one conventional form of shell. This also shows in dotted lines part of the switch mechanism.

Fig. 2 is a top plan view of a device showing the circuit terminals.

Fig. 3 is an end view showing the screw shell and center lamp contact.

Fig. 4: is a bottom view of the body part, the disc being removed and the connecting screws shown in cross section.

Fig. 5 is a horizontal section'and plan showing the switch mechanism. I

Fig. 6 is an exploded perspective view of various parts of the device.

Fig. 7 is a longitudinal sectional view ShOWing the switch mechanism.

Fig. 8 is a detailed side view of the 0SCil-.

lating operating member.

Figs. 9 and 10 are detailed side views of the rotating switch member.

b Fig. 11 is a detailed view of the disc num- The insulating body 15 and disc 16 serve to support the metallic parts. The recess 17 in the body contains a switch mechanism. The screw shell 18 is provided with spaced flanges 19 and 20 which are preferably arranged in planes oflset from each other, as shown in Fig. 7 so that one edge of the disc 16 is inside of the flan e 20 and overlies the flange 19 of the screw s ell. V

The circuit terminals 21 and 22 may be of any suitable type provided with binding 5 screws, lugs, etc. as usual, if'desired. These terminals are held in place by the screws 23 and 24 which pass through the flanges of the screw shell and through thedisc 16.

The screw 23 electrically connects the flange 19 with the circuit'terminal 21. The screw 24 connected to the circuit terminal 22 passes through a large hole in the flange 20 so that no electric connection is made with the screw shell. The disc 16 may have a lug 25 projecting through the screw shell as shown in Fig. 7 to facilitate positioning the parts.

The shaft 26is normally stationary and carries the rotating switch member 27, the g oscillating operator 28 and the chain guide 29. The switch member 27 is provided with ratchet teeth around its periphery and has a conducting contact member 30 on one face with inclined faces 31, 31 on two opposite g5 ratchet teeth. The other face of the ratchet switch member 27 is provided with a ratchet member for coacting with the ratchet member 33 which is secured to the oscillator 28. The chain 34: has its inner end extending around the flange 35 on the oscillator and secured to it. The spring 36 is mounted on the shaft 26 between" the oscillator 28 and the arm 37 of the chain guide. The chain guide 29 and its arm 37 are preferably formed of sheet metal, the bell portion being rolled into shape.

The circuitterminal 22 has a foot-like extension 38 serving as a contact brush engaging the contact member 30. This brush 38 is preferably bifurcated so as to pass on opposite sides of the shaft 26 without contact. The body is provided with a slot 39 through which the brush 38 extends from the outer end to the recess 17.

The center contact 40 preferably resilient has a foot 41 secured to the disc 16 by means of lug 42. One end of the foot .41 is bent back "inside "and provided with "a spring finger 43 adapted to coact with the inclined switch contacts 31 and also with the insulating teeth of the ratchet'27. This conducting member is preferably formed of ,phosphor bronze and the finger 43 serves as a pawl 'to' thus serves asan abutment atithat side for the pressure of thespring35.

The shaft 26 is preferably provided with an extension 50 whichis guided-in-thegroove 45 and .prevents the shaft from irotating. The outer end ofthis extension 50 is iprovided with a bent portion 51 which serves as a stop for the oscillating operator 28. This part 51 also coacts with the disc 16 so as to hold the shaft in :position. The shaft and -itsextensions'will thus be seen to be of hook-likeform and tosupport not onlythe-switch member but the operator-'and-the chain, guide.

This construction Efacilitates 'manufacture and I assembly since the switch -member, the oscillator,-the spring and the chain-guide can all be assembled on the shaft 26 and adjusted as to tension beforetheparts areinserted in the body ofthe socket.

The insulating body 15--andthe variousrecessesare so designedthat the-body can be easily made by the 1 simplest form of dies requiring no side I draw members. The disc 16 may convenientlybe stamped or cut-from fibre. The chain guidebeing securedtothe shaft and thus' associatedustrictly with the i switch mechanism greatly :facilitates the. as sembly of the parts: and their adjustment independently of any socket shell. This switch mechanism and insulating body and r screw shell -may be used in any form 1 of shell, whether of metal, or vof'- insulating: material,

such 5 as, moulded composition, bakelit-e or porcelain. The mounting of the chainguide independently of the shell facilitates this interchangeability. i 1

:Theterm chain is intended-to cover also a cord-Tor other-flexibleelement'suitable. for 1 operating the osoillator28. aIz alsoiw-ishi-t understood that the feature of the chain guide mounted on the main shaft is broadly applicable to pull switches of any type.

Although I have shown and described one form of construction embodying my invention, it should be understood that I do not consider theinvention aslimited to any particular form except asrequired by the terms of the claims or by the state of the art.

I claim:

1. -Ina pull switch, a'body, a shaft mounted therein, and a switch member, an oscillating operating member, a spring and a projecting (tubular chain. guide all mounted on said shaft and insertable and removable therewith.

2. In apull switch, a'hook-shaped shaft, an-oscillating operator and a spring mounted on onepartof said shaft, another part of said shaft serving asa stop for said oscillating operator.

3. Inva pull switch a body having'a recess and with guide grooves at opposite sides of the :recess, a shaft having one end in one .groove-and an angularly pro ect1ngextenslon .zintheopposlte groove and a switch member,

an oscillating operating member, a tubular chainiguide and a spring between said operating member and said chain guide all mounted on said-shaft and removable therewith.

4. In a pullswitch, an insulating body havingarecesswith supporting shoulders,.a shaft supported on said shoulders and having an arm extending at substantially right angles to saidsh-aft, a switch member and an operatingmember and a tubular chain guide mounted on said shaft and an insulating disc closing said recess and holding said shaft arm in place.

5. A socket comprising a body, switch mechanism in the body, circuit terminals at one end of the body, ascrew shell at the other end of the body having two spaced flanges, an insulating dischaving one edge inside of one flange andits opposite edge between the op posite flange and the bodypacenter'contact carried: by saididisc between said-flanges and screws passing through said discand said flanges-andsecuring said circuit terminals in place,onescrew being insulated from one flange and electrical connection between said 1 center contact and said switch mechanism.

6. A pull switch comprising a body having a recess with shoulders at one side and a groove at the otherside, a shaft having one end supported by said shoulders and having anarm extension substantially at right angles to said shaft guided in said groove, said-shaft being "thereby prevented from turning, a

toothed ratchet member rotatable-on said shaft,- an. oscillating operator on the shaft and coacting with saidratchet member, :a spring 'on'said shaft coacting with said operator,

a switch contact on said ratchetrmember,-a circuit terminal having a brush-engagingsaid switch contact, and awspringzfing i cti lw with said toothed ratchet member and a projecting tubular chain guide having an arm secured to said shaft.

7. A pull socket comprising, an insulating body having a recess in one end, an insulating disc closing said recess, a screw shell and a center lamp contactmounted at one end of said body and disc, circuit terminals mounted within the outer surface of the other end of said body, switch mechanism mounted in said body consisting of a shaft, a toothed ratchet on said shaft having a switch contact member, an operating member on said shaft, an operating chain secured to said operating member, a tubular guide for said chain mounted on said shaft and held in place by the body, said center lamp contact having a spring finger extension engaging the teeth of said ratchet, one of said circuit terminals having a brush extension engaging said switch contact memher and means for securing said circuit terminals and said lamp terminals and said disc and body together.

8. A pull switch comprising a body having a recess with shoulders at one side and a groove at the other side, a shaft having one end supported by said shoulders and having an arm extension guided in said groove and thereby prevented from turning, a toothed ratchet member rotatable on said shaft, an oscillating operator on the shaft and coacting with said ratchet member, and adapted to engage said extension, a spring on said shaft coacting with said operator and a stationary tubular chain guide serving as an abutment for said spring.

9. A socket switch comprising a body, a switch member in the body, circuit terminals at one end of the body, one terminal being connected to the switch member, a screw shell at the other end of the body having two spaced flanges, an insulating disc having one edge inside of one flange and its opposite edge between the opposite flange and the body, a center contact carried by said disc between said flanges, a pawl finger extending from said contact to said switch member and screws passing through said disc and said flanges and securing said circuit terminals in place, one screw being insulated from one flange.

10. In a pull switch, an insulating body having a recess with supporting shoulders, at opposite sides, a shaft supported on said shoulders and having a hook like extension, a switch member and an oscillating operator mounted on said shaft and an insulating disc closing said recess and holding said shaft in place, said extension serving as a stop for said operator.

11. A pull switch comprising a body having a recess and with grooves at opposite sides of the recess, a shaft having one end in one groove and the other end in the opposite groove and a switch member, an oscillating operating member and a tubular chain guide all mounted on said shaft said guide projecting outwardly from said body.

12. A pull switch comprising a hookshaped shaft, a switch member, an oscillating member and a chain guide mounted on one part of said shaft, another part of said shaft servin as a stop for said oscillating member.

13. pull switch comprising an insulating body, a shaft mounted transversely therein, an oscillating operating member, and a chain guide pivoted on said shaft and inset-table and removable therewith, said guide having a hollow bell supported in the body and projecting therefrom.

141. A one-piece chain guide bell having an integral extension arm perforated to receive the main shaft.

15. A pull socket having an insulating body containing the switch mechanism, an insulating disc having a peripheral projecting lug, a screw shell having an interlocking connection with said disc and lug and means for securing said shell, disc and body together.

16. A pull switch comprising an insulating body having a central recess opening at one end and side recesses opening in the opposite end, a closure disc for the central recess, a switch mechanism demountably secured in the central recess and held in place by said disc, circuit terminals having binding screws mounted in the side recesses one of said circuit terminals having a contact foot extending into the central recess said switch mechanism having a rotatable member electrically engaging said contact foot, and an oscillating operator coacting with said rotatable member and a pull chain coacting therewith.

17. A pull socket comprising an insulating body having a recess, a shaft removably mounted in said recess, a rotatable switch member mounted on said shaft, an oscillating member mounted on said shaft and coacting with said switch member, a tubular chain guide having an arm mounted on said shaft, and a spring mounted on said shaft having one end engaging said arm and the other end engaging said oscillating member.

FREDRIOK ROSNER. 

